44 lines
1.5 KiB
Prolog
44 lines
1.5 KiB
Prolog
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FaceSaver Format Revealed
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A FaceSaver image is an ASCII file containing some or all of the
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following lines:
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FirstName:
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LastName:
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E-mail:
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Telephone:
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Company:
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Address1:
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Address2:
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CityStateZip:
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Date:
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PicData: Actual data: width - height - bits/pixel
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Image: Should be transformed to: width - height - bits/pixel
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(A REQUIRED Blank line)
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Hexified picture in scanline order, in the form suitable for
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printing in postscript. It is unpadded scanlines, I believe left to
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right. If it is bottom to top it is due to funny transforms in going
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from the real scanned image, which came from a video camera turned on
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its side! (to get a portrait aspect ratio). All the images are 8
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bits per pixel, and have been intensity levelled to use up the full
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dynamic range (each pixel multiplied by 256/(max-min) and shifted so
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that min becomes zero). I'm sorry about that, I should have put out
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untransformed data. The original frame grabbing was off a Targa M8,
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and the gamma varied due to a number of real world factors. Most
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pictures had a dynamic range in the 128--196 vicinity.
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The line labeled Image: can be used to correct for non-square pixels.
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In most cases, there are 108 (non-square) pixels across in the data,
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but they would have been 96 pixels across if they were square.
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Therefore, Image: says 96, PicData says 108.
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Lou Katz
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Saver of Lost Faces
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lou@usenix.org
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(415) 530-8870
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